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|
/******************************************************************************
* Copyright (C) 2018 Alejandro Colomar Andrés *
* SPDX-License-Identifier: GPL-2.0-only *
******************************************************************************/
/******************************************************************************
******* headers **************************************************************
******************************************************************************/
#include "label/label.h"
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <time.h>
#include <zbar.h>
#define ALX_NO_PREFIX
#include <libalx/base/compiler/size.h>
#include <libalx/base/errno/error.h>
#include <libalx/base/stdio/printf/sbprintf.h>
#include <libalx/base/stdlib/maximum.h>
#include <libalx/extra/cv/alx.h>
#include <libalx/extra/cv/core.h>
#include <libalx/extra/cv/highgui.h>
#include <libalx/extra/cv/imgproc.h>
#include <libalx/extra/ocr/ocr.h>
#include <libalx/extra/zbar/zbar.h>
/******************************************************************************
******* macros ***************************************************************
******************************************************************************/
/******************************************************************************
******* enum / struct / union ************************************************
******************************************************************************/
/******************************************************************************
******* static functions (prototypes) ****************************************
******************************************************************************/
static
int init_cv (img_s **img_1, img_s **img_2, rect_rot_s **rect_rot);
static
void deinit_cv (img_s *img_1, img_s *img_2, rect_rot_s *rect_rot);
static
int proc_label_steps(const char *restrict fname);
static
int find_label (const img_s *restrict img,
rect_rot_s *restrict rect_rot);
static
int align_label (img_s *restrict img,
const rect_rot_s *restrict rect_rot);
static
int find_cerdo (const img_s *restrict img,
const rect_rot_s *restrict rect_rot);
static
int read_barcode (const img_s *restrict img,
char bcode[static restrict BUFSIZ]);
static
int read_price (const img_s *restrict img,
const rect_rot_s *restrict rect_rot,
char price[static restrict BUFSIZ]);
static
int chk_bcode_prod (const char bcode[static restrict BUFSIZ]);
static
int chk_bcode_price (const char bcode[static restrict BUFSIZ],
const char price[static restrict BUFSIZ]);
static
void report (const char bcode[static restrict BUFSIZ],
const char price[static restrict BUFSIZ]);
/******************************************************************************
******* global functions *****************************************************
******************************************************************************/
int proc_label (const char *restrict fname)
{
clock_t time_0;
clock_t time_1;
double time_tot;
time_0 = clock();
if (proc_label_steps(fname))
return -1;
time_1 = clock();
time_tot = ((double) time_1 - time_0) / CLOCKS_PER_SEC;
printf("Total time: %5.3lf s;\n", time_tot);
return 0;
}
/******************************************************************************
******* static functions (definitions) ***************************************
******************************************************************************/
static
int init_cv (img_s **img_1, img_s **img_2, rect_rot_s **rect_rot)
{
if (alx_cv_alloc_img(img_1))
return -1;
if (alx_cv_init_img(*img_1, 1, 1))
goto out_free_1;
if (alx_cv_alloc_img(img_2))
goto out_deinit_1;
if (alx_cv_init_img(*img_2, 1, 1))
goto out_free_2;
if (alx_cv_alloc_rect_rot(rect_rot))
goto out_deinit_2;
return 0;
out_deinit_2:
alx_cv_deinit_img(img_2);
out_free_2:
alx_cv_free_img(img_2);
out_deinit_1:
alx_cv_deinit_img(img_1);
out_free_1:
alx_cv_free_img(img_1);
return -1;
}
static
void deinit_cv (img_s *img_1, img_s *img_2, rect_rot_s *rect_rot)
{
alx_cv_free_rect_rot(rect_rot);
alx_cv_deinit_img(img_2);
alx_cv_free_img(img_2);
alx_cv_deinit_img(img_1);
alx_cv_free_img(img_1);
}
static
int proc_label_steps(const char *restrict fname)
{
img_s *img;
img_s *img_tmp;
rect_rot_s *rect_rot;
char bcode[BUFSIZ];
char price[BUFSIZ];
int status;
status = -1;
if (init_cv(&img, &img_tmp, &rect_rot))
return -1;
if (alx_cv_imread(img, fname))
goto err;
if (find_label(/*const*/img, rect_rot)) {
fprintf(stderr, "Label not found");
goto err;
}
if (alx_cv_component(img, ALX_CV_CMP_GREEN)) {
fprintf(stderr, "Couldn't extract green component");
goto err;
}
alx_cv_clone(img_tmp, img);
if (align_label(img_tmp, /*const*/rect_rot)) {
fprintf(stderr, "Couldn't align label");
goto err;
}
if (find_cerdo(/*const*/img_tmp, /*const*/rect_rot)) {
fprintf(stderr, "\"Cerdo\" not found");
goto err;
}
if (read_barcode(/*const*/img, bcode)) {
fprintf(stderr, "Barcode not found");
goto err;
}
if (read_price(/*const*/img_tmp, /*const*/rect_rot, price)) {
fprintf(stderr, "Price not found");
goto err;
}
if (chk_bcode_prod(/*const*/bcode)) {
fprintf(stderr, "Product doesn't match in barcode");
goto err;
}
if (chk_bcode_price(/*const*/bcode, price)) {
fprintf(stderr, "Price doesn't match in barcode");
goto err;
}
report(bcode, price);
status = 0;
err:
deinit_cv(img, img_tmp, rect_rot);
return status;
}
static
int find_label (const img_s *restrict img,
rect_rot_s *restrict rect_rot)
{
img_s *img_tmp;
conts_s *conts;
const cont_s *cont;
int status;
ptrdiff_t nconts;
status = -1;
if (alx_cv_alloc_img(&img_tmp))
return -1;
if (alx_cv_init_img(img_tmp, 1, 1))
goto out_free_tmp;
if (alx_cv_alloc_conts(conts))
goto out_deinit_tmp;
alx_cv_init_conts(conts);
alx_cv_clone(img_tmp, img);
if (alx_cv_component(img_tmp, ALX_CV_CMP_BLUE))
goto err;
if (alx_cv_smooth(img_tmp, ALX_CV_SMOOTH_MEDIAN, 7))
goto err;
alx_cv_invert(img_tmp);
if (alx_cv_smooth(img_tmp, ALX_CV_SMOOTH_MEAN, 21))
goto err;
if (alx_cv_threshold(img_tmp, ALX_CV_THRESH_BINARY_INV, 2))
goto err;
if (alx_cv_dilate_erode(img_tmp, 100))
goto err;
if (alx_cv_contours(img_tmp, conts))
goto err;
alx_cv_extract_conts(conts, &cont, &nconts);
if (nconts != 1)
goto err;
alx_cv_min_area_rect(rect_rot, cont);
status = 0;
err:
alx_cv_deinit_conts(conts);
alx_cv_free_conts(conts);
out_deinit_tmp:
alx_cv_deinit_img(img_tmp);
out_free_tmp:
alx_cv_free_img(img_tmp);
return status;
}
static
int align_label (img_s *restrict img,
const rect_rot_s *restrict rect_rot)
{
if (alx_cv_rotate_2rect(img, rect_rot))
return -1;
return 0;
}
static
int find_cerdo (const img_s *restrict img,
const rect_rot_s *restrict rect_rot)
{
img_s *img_tmp;
rect_s *rect;
ptrdiff_t rectrot_ctr_x, rectrot_ctr_y, rectrot_w, rectrot_h;
ptrdiff_t lbl_x, lbl_y, lbl_w, lbl_h;
void *imgdata;
ptrdiff_t imgdata_w, imgdata_h, B_per_pix, B_per_line;
char text[BUFSIZ];
int status;
status = -1;
if (alx_cv_alloc_img(&img_tmp))
return -1;
if (alx_cv_init_img(img_tmp, 1, 1))
goto out_free_tmp;
if (alx_cv_alloc_rect(&rect))
goto out_deinit_tmp;
alx_cv_clone(img_tmp, img);
alx_cv_extract_rect_rot(rect_rot, &rectrot_ctr_x, &rectrot_ctr_y,
&rectrot_w, &rectrot_h, NULL);
lbl_x = rectrot_ctr_x - (1.05 * rectrot_w / 2);
lbl_y = rectrot_ctr_y - (1.47 * rectrot_h / 2);
lbl_w = rectrot_w / 2;
lbl_h = rectrot_h * 0.20;
if (lbl_x < 0)
lbl_x = 0;
if (lbl_y < 0)
lbl_y = 0;
if (alx_cv_init_rect(rect, lbl_x, lbl_y, lbl_w, lbl_h))
goto err;
alx_cv_roi_set(img_tmp, rect);
if (alx_cv_threshold(img_tmp, ALX_CV_THRESH_BINARY, ALX_CV_THR_OTSU))
goto err;
if (alx_cv_erode(img_tmp, 1))
goto err;
alx_cv_extract_imgdata(img_tmp, &imgdata, NULL, NULL,
&imgdata_w, &imgdata_h,
&B_per_pix, &B_per_line, NULL);
if (alx_ocr_read(ARRAY_SIZE(text), text, imgdata, imgdata_w, imgdata_h,
B_per_pix, B_per_line,
ALX_OCR_LANG_SPA, ALX_OCR_CONF_NONE))
goto err;
if (strncmp(text, "Cerdo", strlen("Cerdo")))
status = 1;
else
status = 0;
err:
alx_cv_free_rect(rect);
out_deinit_tmp:
alx_cv_deinit_img(img_tmp);
out_free_tmp:
alx_cv_free_img(img_tmp);
return status;
}
static
int read_barcode (const img_s *restrict img,
char bcode[static restrict BUFSIZ])
{
img_s *img_tmp;
void *imgdata;
ptrdiff_t rows, cols;
int status;
status = -1;
if (alx_cv_alloc_img(&img_tmp))
return -1;
if (alx_cv_init_img(img_tmp, 1, 1))
goto out_free_tmp;
alx_cv_clone(img_tmp, img);
alx_cv_extract_imgdata(img_tmp, &imgdata, &rows, &cols, NULL, NULL,
NULL, NULL, NULL);
if (alx_zbar_read(BUFSIZ, bcode, NULL, imgdata, rows, cols, ZBAR_EAN13))
goto err;
status = 0;
err:
alx_cv_deinit_img(img_tmp);
out_free_tmp:
alx_cv_free_img(img_tmp);
return status;
}
static
int read_price (const img_s *restrict img,
const rect_rot_s *restrict rect_rot,
char price[static restrict BUFSIZ])
{
img_s *img_tmp;
rect_s *rect;
ptrdiff_t rectrot_ctr_x, rectrot_ctr_y, rectrot_w, rectrot_h;
ptrdiff_t prc_x, prc_y, prc_w, prc_h;
void *imgdata;
ptrdiff_t imgdata_w, imgdata_h, B_per_pix, B_per_line;
int status;
status = -1;
if (alx_cv_alloc_img(&img_tmp))
return -1;
if (alx_cv_init_img(img_tmp, 1, 1))
goto out_free_tmp;
if (alx_cv_alloc_rect(&rect))
goto out_deinit_tmp;
alx_cv_clone(img_tmp, img);
alx_cv_extract_rect_rot(rect_rot, &rectrot_ctr_x, &rectrot_ctr_y,
&rectrot_w, &rectrot_h, NULL);
prc_x = rectrot_ctr_x - (0.33 * rectrot_w / 2);
prc_y = rectrot_ctr_y - (0.64 * rectrot_h / 2);
prc_w = rectrot_w * 0.225;
prc_h = rectrot_h * 0.15;
if (prc_x < 0)
prc_x = 0;
if (prc_y < 0)
prc_y = 0;
if (alx_cv_init_rect(rect, prc_x, prc_y, prc_w, prc_h))
goto err;
alx_cv_roi_set(img_tmp, rect);
if (alx_cv_smooth(img_tmp, ALX_CV_SMOOTH_MEAN, 3))
goto err;
if (alx_cv_threshold(img_tmp, ALX_CV_THRESH_BINARY, ALX_CV_THR_OTSU))
goto err;
if (alx_cv_dilate_erode(img_tmp, 1))
goto err;
if (alx_cv_threshold(img_tmp, ALX_CV_THRESH_BINARY, 1))
goto err;
alx_cv_extract_imgdata(img_tmp, &imgdata, NULL, NULL,
&imgdata_w, &imgdata_h,
&B_per_pix, &B_per_line, NULL);
if (alx_ocr_read(BUFSIZ, price, imgdata, imgdata_w, imgdata_h,
B_per_pix, B_per_line,
ALX_OCR_LANG_DIGITS,
ALX_OCR_CONF_PRICE_EUR))
goto err;
status = 0;
err:
alx_cv_free_rect(rect);
out_deinit_tmp:
alx_cv_deinit_img(img_tmp);
out_free_tmp:
alx_cv_free_img(img_tmp);
return status;
}
static
int chk_bcode_prod (const char bcode[static restrict BUFSIZ])
{
if (strncmp(bcode, "2301703", strlen("2301703")))
return 1;
return 0;
}
static
int chk_bcode_price (const char bcode[static restrict BUFSIZ],
const char price[static restrict BUFSIZ])
{
char bcode_price[BUFSIZ];
if (bcode[8] != '0') {
if (sbprintf(bcode_price, NULL, "%c%c.%c%c", bcode[8], bcode[9],
bcode[10], bcode[11]))
return -1;
} else {
if (sbprintf(bcode_price, NULL, "%c.%c%c", bcode[9],
bcode[10], bcode[11]))
return -1;
}
if (strncmp(price, bcode_price, strlen(bcode_price)))
return 1;
return 0;
}
static
void report (const char bcode[static restrict BUFSIZ],
const char price[static restrict BUFSIZ])
{
printf("Code: %s\n", bcode);
printf("Price: %5s EUR\n", price);
}
/******************************************************************************
******* end of file **********************************************************
******************************************************************************/
|
